Studying the Microstructure, Physical and Mechanical Properties of Al Matrix Reinforced with Bi-Modal Particles Coated with Either Ni or Cu

Abstract

Powder metallurgy was used to fabricate Al/(SiC-Y2O3)/Ag/Cu or Ni nanocomposite. The ratio of SiC to Y2O3 was 50:50. SiC-Y2O3 particles were coated with 10 wt% nano-Ag, followed by coating with another layer of 10% nano-Ni or nano-Cu by an electroless chemical deposition technique. All samples were compacted by a uniaxial press under 480 MPa and then sintered in a vacuum furnace at 600 °C for 1 h holding time. Coated samples with nano-Cu have the highest densification values. The microstructure of nano-Cu-coated composites is more homogenous than nano-Ni ones. X-ray diffraction analysis (XRD) indicated the presence of Al peaks as a major phase, and Al3NiSi and AlCu intermetallics are detected. Also, traces of SiC and Y2O3 peaks are recorded. Hardness results showed that (SiC-Y2O3)/ nano-Ag/nano-Cu samples have higher hardness values than nano-Ni samples. Also, both the electrical and thermal conductivities are higher for nano-Cu-coated samples than for nano-Ni coated ones.

Enhancement of microstructural, mechanical and tribological properties of hybrid Al- CNTs through electroless deposition of innovative h-BNs contents coated Ag and Ni for purpose of ball bearing

“…In addition, it can be concluded that the hardness measurements of the Al-matrix and their hybrid composites are compatible with the near-full densification properties for the produced hybrid nanocomposites Fig. (7). The presence of a ceramic material such as h-BN with its high hardness and good distribution with a good adhesion with the Al matrix particles helps in improving the total hardness of the final prepared nano composites.…”

“…Incorporating nanoparticles, such as CNTs, graphene, or ceramic nanoparticles, into a metal matrix can significantly enhance the mechanical properties of the resulting HMMNCs. This includes improved strength, stiffness, hardness, and wear resistance [2,6,7]. HMMNCs exhibit enhanced thermal conductivity and stability, making them suitable for applications that involve high-temperature environments, such as aerospace and automotive components.…”